Ingot stripper



c. L.. BIGLER ET Al. 2,063,656

Dec. s, 1936.

INGOT STRIPPER Filed Feb. 15', 1955 FIG-1- #HARVEY /L/ 5511.

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Patented Dec. 8), 1936 @UNITED 4STAT-ias oFiFlcE Ohio, Vassignors to The ,Morgan yEngineering Company, Alliance, Ohio Application February 15,193.5,1ser`ia1N0- 6,763 5 Claims. (onza-95)' section vof one form of the apparatus, the two "views being taken at right angles to one another, uand Fig. 2 showingI the stripper in use with different types of molds and ingots which are illustrated in dotted lines.

l In the drawing3 designates a vertically movable` head Asupported by a nut`4 which engages the upper threads 5 of a double screw 6 which is carried-byacrane trolley (not shown), and may be rotatedby any suitable means, such ras that disclosed inthe above mentioned patent. Links l depend from the head and are pivotally mounted on `axles 8 carried by the head, and the lower ends of these links'may be swung toward or away from. Ioneanother by any suitable means, for example, that shown in said patent. In the present case, theflinks have tips 9 which may be brought to rest .ofn` the mold stool I0 when itis desired to preventthe `stool from rising while a big end down. ingotisloosened from the stool. Each link also has an innershoulder II designed to rest on `the 4top l'of' the mold while a big end up or hot top ingot is stripped from the same.

vIntermediate the shoulders II and tips 9the links have cross pieces I2 designed to engagefears f I3.r on certain types .of molds for lifting the mold from the ingot.

. Inthepresentinvention, thev .tong levers IlI are pivoted intermediate their ends on trunnions I5 which are supported by any suitable means such as a member I6 suspended from rods I1 which have their upper ends extending through eyes I8 on the head 3. Coil springs I9 are positioned between the eyes and adjusting nuts 20 secured to the upper ends of the rods.

The lower ends of the tong levers are provided with spurs 2I to bite into the upper end of a big end up ingot or into the upper end of a big end down ingot, after the mold has been removed from the latter. The lower ends of the tong levers are moved toward and away from one another 'by a vertically movable member 22 which has cam tracks 23 engaging rollers 24 mounted on the upper ends of the tong levers. The member 22 is suspended from a tube 25 having a nut 26 that is in threaded engagement with the lower threads 2l of the double screw 6, and it will be understood that when the screw 6 is rotated in one direction, the member 22 will be moved downwardly and the links 'I will be moved upwardly, and on the other hand, when the member 22 is moved upwardly, the links will be moved downwardly.

It will be observed that the trunnions I5 and 8 are positioned parallel to each other to accom- This invention relates to improvements in ingot f'strippers, and more especially to equipment l:adapted for stripping big end up or hot top or little end up or standard ingots from molds v` and `for breaking standard ingots loose fromv the -stoolsonwhich they rest."

It has heretofore been proposed to provide 'mechanism' forv these purposes, but su'ch apparatusoriequresi a removal .of thebullfhead when stripping hot tops, as well as the attachment of a longhorseshoe shaped .casting when loosening standard ingots' from the stools. Furthermore, it 4requires about ten `minutes to vmake'such changes, and this is considered quite a drawback if the heat to be stripped contains both types ofmolds. Therefore, the primaryobject of the present inv1'verltlon' isti', ofurnish stripper apparatus that will `-perform all of these operations without changing the-mechanism or requiring much time to alter theapparatus from one'adapted for one purpose to another adapted for another purpose.

f To demonstrate the advantages of the present invention, attentionis called to the patent to'Big- 'lejrfand Kl'oos,No. 1,807,275, dated May 26,v 1931. ALY'Inthe'structure there shown, a bull head or nose may be used for pushing downwardly on the ingot whilefaebig end .down .mold is lifted from the ingot`,`'and thisbullfhead is removed when the apparatus to be employed for stripping a big end up or hot top ingot from a big end up mold. Furthermore, in that patent, the ingot tongs are movable about axes arranged at right angles to the mold handling links, while in the present construction, the tongsand links are movable about parallel axes so as to permit the bull head to be so mounted that it may swing in a plane at right angles to said axes. In other words, the tongs and links are so arranged as to provide clearance for the movement of the bull head to permit the latter to be adjusted or moved without interference by the tongs and links. Moreover, the links in the improvement are of greater length than those in the patented structure to allow the links to engage a stool While the tongs loosen a big end down ingot from thev stool.

With the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims.

The invention is illustrated'ln the accompanying drawing, in which y Figs. 1 and 2 are elevations, partly in vertical modate swinging movement of a bull head or nose 28. This head is carried by the member I6 and it has a slot 29 at its upper end to receive a trunnion 30 supported by the member I6. This permits the bull head to be swung from the vertical position shown in full lines in Fig. 2, into the horizontal position shown in dotted lines in that figure. To accomplish this movement, a link 3I is pivotally connected to the member I6 at the point 32, and the lower end of this link is connected to a second link 33 that is pivoted to the bull nose at the point 34. A longer link 40 is also pivotally connected to the bull nose and may be lifted by any suitable means for moving the linkage and bull head from the full line position shown in Fig. 1 to the dotted line position illustrated in that iigure.

Assuming the apparatus is to be used for stripping a big end down ingot from a mold, the bull head 28 is placed in vertical position, and while it is employed to press the ingot downwardly, the cross members I2 on the links 'I may engage the ears I3 of the mold to strip the same from the ingot.

If the device is to be employed for stripping a hot top ingot from a big end up mold, the bull head is moved into horizontal position and the spurs of the tongs are brought into gripping relation with the hot top. Then, while the tongs are lifting the ingot, the shoulders can exert equal force on the mold for holding it down while the ingot is elevated.

After a big end down mold is lifted from an ingot, the lower ends of the links I may be brought to rest on the stool Ii), and the links will hold the stool down while the tongs I4 are employed to loosen the ingot from the stool and lift the ingot.

Of course, the links and tongs may be handled by any suitable means which will control the closing and opening of the tongs and links, as well as the lifting and lowering of the links and tongs, but we prefer that the double screw be used as a part of such mechanism, as it has proved particularly efficient in practice.

While we have disclosed what we now consider to be a preferred embodiment of the invention in such manner that the same may be readily understood by those skilled in the art, we are aware that changes may be made in the details disclosed without departing from the spirit of the invention, as expressed in the claims.

What is claimed and desired to be secured by Letters Patent is:

1. In an ingot stripper, in combination, a supporting structure, ingot-gripping tongs and moldengaging links carried by the supporting structure, a bull head pivotally connected to the supporting structure at a point arranged between said tongs, and means for moving said bull head into and out of a vertical position between said links.

2. In an ingot stripper, supporting means, ingot-gripping tongs and mold-engaging links pivotally connected to the supporting means, a bull head pivotally connected to the supporting means at a point arranged between said tongs, and means for moving said bull head into and out of a vertical position between said tongs.

3. In an ingot stripper, supporting means, ingot-gripping tongs and moldengaging links pivotally mounted on the supporting means, a bull head having its upper end pivotally connected to the supporting means at a point arranged between said tongs, and means for moving said bull head into and out of a vertical position between said tongs and links.

4. In an ingot stripper, supporting means, ingot engaging tongs carried by the supporting means, mold engaging links carried by the supporting means, means for moving the tongs into and out of ingot gripping position, a bull head pivotally carried by said supporting means, and means for moving the bull head into and out of a vertical position between the tongs.

5. An ingot stripper comprising supporting means for parallel trunnions, tong levers mounted on certain of said trunnions and having spurs movable toward and away from one another, means for operating said tong levers, mold engaging links pivotally mounted on the other trunand means for swinging said bull head into and out of a position between said tong levers.

CLINTON L. BIGLER. HARVEY W. BALL. 

